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封闭溶样-AAS法测定特高品位矿石中的金银
引用本文:邱宏喜,王志杰,王达成,张汝生,谢璐. 封闭溶样-AAS法测定特高品位矿石中的金银[J]. 黄金, 2014, 0(3): 80-84
作者姓名:邱宏喜  王志杰  王达成  张汝生  谢璐
作者单位:[1]中国人民武装警察部队黄金九支队,571127 [2]中国人民武装警察部队黄金七支队,571127 [3]中国人民武装警察部队黄金地质研究所,571127
摘    要:影响特高品位矿石中Au、Ag准确测定的因素主要有AgCl、PbCl2沉淀和Au、Ag矿物的硅酸盐包裹体,W、Mo、Sb和Pb等竞争吸附,容量分析的滴定终点干扰,以及待测溶液的介质及浓度等。研究确定了HCl-HNO3-KClO3(-NH4 HF2)和( NH2)2 CS封闭溶样,泡沫塑料分段富集(或活性炭富集),AAS法硫脲介质测定矿石中的Au、Ag。该方法可有效避免各影响因素干扰,且操作简便、不污染环境,分析结果的精密度( RSD )为0.66%~0.93%,国家标准样品加标回收率为98%~102%。

关 键 词:封闭溶样  AAS法  特高品位矿石      绿色化学

Determination of Au and Ag in high grade ores by sealed dissolution-AAS method
Qiu Hongxi,Wang Zhijie,Wang Dacheng,Zhang Ru sheng,Xie Lu. Determination of Au and Ag in high grade ores by sealed dissolution-AAS method[J]. Gold, 2014, 0(3): 80-84
Authors:Qiu Hongxi  Wang Zhijie  Wang Dacheng  Zhang Ru sheng  Xie Lu
Affiliation:1. No. 9 Gold Geological Party, CAPF; 2. No. 7 Gold Geological Party, CAPF; 3. Gold Geology Research Institute, CAPF)
Abstract:Factors that affect the determination of Au and Ag in ultra high grade ores include the precipitation of AgCl and PbCl2,silicate inclusions of Au and Ag,competitive adsorption of W,Mo,Sb and Pb,and the media and con-centration of the solution to be tested .Au and Ag determination by the HCl-HNO3-KClO3 (-NH4 HF2 ) and ( NH2 ) 2 CS sealed dissolution -AAS method in thiourea media can effectively avoid all kinds of interference and is easy to operate and not pollutant to the environment .The RSD is 0.66%to 0.93%and the national standard material recovery rate is 98 %to 102 %.
Keywords:seal dissolution  AAS  ultra high grade ores  gold  silver  green chemistry
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